Pulling and holding device



J. A. WATTERWORTH.

PULLING AND HOLDING DEVICE. APPLICATION FILED MAR. 2. $920.

Patented Aug. 30, 1921.

' INVENTOR ATTORNEY PATENT OFFICE.

JOHN A. WATTERWORTH, OF DULUTH, MINNESOTA.

JPULLING AND HOLDING DEVICE.

To all whom it may concern e it known that I, J OHN A. lVATTnR- WORTH, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Pulling and Holding Devices, of which the fol lowing is a specification, reference being had therein to the accompanying drawing.

his invention relates to pulling and holding devices and is especially designed for of fabricated metal strucand the embodiment here shown is: particularly designed for the f plates when the latter prior to being riveted or otherwise permanently united. To those versed in the art of ship building up of the structure is known to be a Very expensive and laborious process representing a material portion of the cost of ship construction, and to provide a simple mechanism to assist in the reduction of this expense and to expedite the bolting up process, is the principal object of the invention.

' Ot ier objects and advantages of the novel features of my invention will appear in the further description thereo Referring to the accompanying drawings forming part of this application and in which like reference characters indicate like parts:

Figure 1 is a side elevation of my com pletely assembled apparatus in the. act of pulling two plates together.

Fig. 2 is a side elevation of the adjustable split nut in receptive positionfor a bolt.

Fig. 3 is an end elevation of Fig. 2, and

Fig.4 is a top plan View of Fig. 3.

1 represents the body portion of a manually operated jack-screw such as are commonly used in connection with an automob-ile or the like, it" with the beveled gears 2 and 3, the former being the driving tlvely connectedthei-ewith aratchet wheel justed to operate the ratchet wheel in either direction as is common insuch devices.

The driven gear 3 is horizontally disposed upon the top of-the body portion 1, is internally screw-threaded, and carries the vertically reciprocal screw-threaded shank or Specification of Letters Patent. Application filed March 2, 1920. Serial No.

the assembling and bolting having associated there the receiving head is of like Patented Aug. 30, 19.21. 362,799.

stem 7, the latter being raised or lowered by the rotation of said gears, as is obvious.

n the upper end of the stem 7 is pivotally carried the face plate 8 all of which structure thus far described is common to such a jack-screw.

Now, as to the new features involved and to such'structure, the first consists of forming a through axiall disposed hole longitudinally of the stem 7 so that it becomes possible to mount the jackrod, or in other words to insert a bolt or rod into. the jack-screw longitudinally thereof for pulling purposes, and by so doing transform said screw into a pulling screw rather than a jack or lifting screw, though the results are practically the same.

a projecting fin or web 9 having a series of holes 10 therein into which a suitable hook, chain or line 11 may be attached for con veniently suspending or holding the pulling screw in position. when being used horizontally, as for example 011 the sides of a ship, and not only will such attachment assist in the successful manipulation of the screw but guard against danger from accidental falling of the device. On the face plate 8 is securely fixed by suitable bolts 12, the rectangularly shaped bed plate 13, having grooves or channels 14 resting upon the upper face of the bed plate, are slidably mounted the two opposed halves 15 of theengaging head of the pulling screw. The head are of rectan ular halves 15 of the renewing or repairing as desired.

Attention is further directed to the fact by this arrangement a nut of any desired thickness may be employed, provided dimension so that ample hold of the bolt being operated upon may be had. shown, and which has been put into practice, the split nut is approximately twice the thickness of an ordinary nut, which is found to insure same against the possibility of stripping the thread.

The two halves of the head 15, carrying the split nut, are operative to and from each other by the toggle bridle comprising the substantially U-shaned hand strap 18, the free ends of which are pivotally attached to the sides of one of the halves 15 of the head as at 19, upon which it is swingingly adjustable either to vertical position as shown in Figs. 2, 3 and at or to horizontal position as shown in Fig. 1, and the two straps 202O which are pivotally connected as at 21 to the strap 18 adjacent its pivotal connection to the head, and at the other end as at 22 to the farthermost lower corner of the opposite section 15 of the head, there being a strap 20 upon either side of the sections of the head.

By this arrangement it is evident that when the strap 18 is raised to its vertical position as shown in the drawings, the sections of the head together with those of the split nut are in their separated receptive position ready to clamp about a bolt as it is made to protrude axially through the stem 7 of the pulling jack and when it is desired to clamp the split nut about such a bolt the strap 18 is swung down to a position slightly past that of being horizontal with the straps 20 which will not only bring the sections of the split nut immediately in contact with the bolt 23 as shown as being engaged but in this lowermost extreme position securely lock the halves of the nut in such position, the pivotal points 21 having slightly passed the horizontal alinement of the pivotal points 19 and 22 thus securing the device againstbecoming disengaged when pressure is applied thereto.

Adjacent each end of the bed plate 13 and centrally thereof is an upwardly protruding screw bolt 24: which is for the purpose of regulating the outward movement of the halves of the otherwise free within the bed plate they will automatically adjust themselves laterally when operated, but said bolts 24 are so positioned as to insure both halves being amply moved to clear the bolt when the strap 18 is in its vertical position.

The belt commonly used in conjunction with the pulling jack is one having a head and that would be thrust through the registering holes in two plates,-such as those indicated at 25 and 26 which it is desired to draw together. Then, after'the split nut In fact in the device head, and the latter being is engaged about the screw threaded portion of the bolt by proper manipulation of the handle 5 the plates maybe quickly and exceedingly forcefully drawn together, when the bolting of the plates will continue in a manner similar to that which is practised when other means of pulling and holding the plates is employed.

From the foregoing it is evident that I have provided an exceedingly simple and practical device for the purpose intended and which may be considerably modified from the structure here shown without departing from the fundamental principles thereof.

Having thus described my I claim and desire to secure ent is:

1. In combination, a jack screw of the character described having an axial bore entirely through the screw thereof, a threaded bolt through the entire length of the jack screw and extending thereabove, a bed plate pivotally carried upon the upper end of the screw of the jack and a split nut adjustably carried upon the bed plate and means whereby the bolt maybe engaged or disengaged manually by the split nut.

2. In combination, a jack screw of the character described having an axial bore entirely through the screw thereof, a threaded bolt through the entire length of the jack screw andextending thereabove, a bed plate carried upon the upper end of the screw of the jack and a-split nut adjustably carried upon the bedplate and means whereby the bolt, may be engaged or disengaged manually by the split nut. I

3 In combination, a jack screw of the character described having an axial bore entirely through the screw thereof, a threaded bolt through the entire length of the jack screw and extending thereabove, a split nut adjustably carried upon the upper end of the screw of the jackkand means whereby the bolt may be engaged or disengaged manually by the split nut. 7

4. In combination a jack screw of the character described having an axial bore entirely through the screw thereof, a threaded bolt through the entire length of the jack screw and extending thereabove, and a manually adjustable split nut carried upon said bolt above the upper :end of the screw of the jack.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

JOHN 'A. WATTERWVORTH.

Witnesses: i i W. H. Brsnor,

J N. PENDLETON.

invention what by Letters Fat 

